A landlord received a token advance of £20,000 from a tenant who intended to move in on April 5th, with rent starting from April 1st. The tenant has now requested to delay their move-in until April 22nd and pay rent only from that date. The landlord is concerned about the financial loss incurred by blocking the property for a month and is seeking advice on whether they can forfeit the token amount or how to handle the situation amicably.